NetBSD/crypto/dist/ssh/sftp-client.c

1120 lines
26 KiB
C

/* $NetBSD: sftp-client.c,v 1.17 2002/07/01 05:56:45 itojun Exp $ */
/*
* Copyright (c) 2001,2002 Damien Miller. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* XXX: memleaks */
/* XXX: signed vs unsigned */
/* XXX: remove all logging, only return status codes */
/* XXX: copy between two remote sites */
#include "includes.h"
RCSID("$OpenBSD: sftp-client.c,v 1.34 2002/06/27 10:35:47 deraadt Exp $");
#include <sys/queue.h>
#include "buffer.h"
#include "bufaux.h"
#include "getput.h"
#include "xmalloc.h"
#include "log.h"
#include "atomicio.h"
#include "sftp.h"
#include "sftp-common.h"
#include "sftp-client.h"
/* Minimum amount of data to read at at time */
#define MIN_READ_SIZE 512
struct sftp_conn {
int fd_in;
int fd_out;
u_int transfer_buflen;
u_int num_requests;
u_int version;
u_int msg_id;
};
static void
send_msg(int fd, Buffer *m)
{
int mlen = buffer_len(m);
int len;
Buffer oqueue;
buffer_init(&oqueue);
buffer_put_int(&oqueue, mlen);
buffer_append(&oqueue, buffer_ptr(m), mlen);
buffer_consume(m, mlen);
len = atomic_write(fd, buffer_ptr(&oqueue), buffer_len(&oqueue));
if (len <= 0)
fatal("Couldn't send packet: %s", strerror(errno));
buffer_free(&oqueue);
}
static void
get_msg(int fd, Buffer *m)
{
u_int len, msg_len;
unsigned char buf[4096];
len = atomic_read(fd, buf, 4);
if (len == 0)
fatal("Connection closed");
else if (len == -1)
fatal("Couldn't read packet: %s", strerror(errno));
msg_len = GET_32BIT(buf);
if (msg_len > 256 * 1024)
fatal("Received message too long %u", msg_len);
while (msg_len) {
len = atomic_read(fd, buf, MIN(msg_len, sizeof(buf)));
if (len == 0)
fatal("Connection closed");
else if (len == -1)
fatal("Couldn't read packet: %s", strerror(errno));
msg_len -= len;
buffer_append(m, buf, len);
}
}
static void
send_string_request(int fd, u_int id, u_int code, char *s,
u_int len)
{
Buffer msg;
buffer_init(&msg);
buffer_put_char(&msg, code);
buffer_put_int(&msg, id);
buffer_put_string(&msg, s, len);
send_msg(fd, &msg);
debug3("Sent message fd %d T:%u I:%u", fd, code, id);
buffer_free(&msg);
}
static void
send_string_attrs_request(int fd, u_int id, u_int code, char *s,
u_int len, Attrib *a)
{
Buffer msg;
buffer_init(&msg);
buffer_put_char(&msg, code);
buffer_put_int(&msg, id);
buffer_put_string(&msg, s, len);
encode_attrib(&msg, a);
send_msg(fd, &msg);
debug3("Sent message fd %d T:%u I:%u", fd, code, id);
buffer_free(&msg);
}
static u_int
get_status(int fd, u_int expected_id)
{
Buffer msg;
u_int type, id, status;
buffer_init(&msg);
get_msg(fd, &msg);
type = buffer_get_char(&msg);
id = buffer_get_int(&msg);
if (id != expected_id)
fatal("ID mismatch (%u != %u)", id, expected_id);
if (type != SSH2_FXP_STATUS)
fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
SSH2_FXP_STATUS, type);
status = buffer_get_int(&msg);
buffer_free(&msg);
debug3("SSH2_FXP_STATUS %u", status);
return(status);
}
static char *
get_handle(int fd, u_int expected_id, u_int *len)
{
Buffer msg;
u_int type, id;
char *handle;
buffer_init(&msg);
get_msg(fd, &msg);
type = buffer_get_char(&msg);
id = buffer_get_int(&msg);
if (id != expected_id)
fatal("ID mismatch (%u != %u)", id, expected_id);
if (type == SSH2_FXP_STATUS) {
int status = buffer_get_int(&msg);
error("Couldn't get handle: %s", fx2txt(status));
return(NULL);
} else if (type != SSH2_FXP_HANDLE)
fatal("Expected SSH2_FXP_HANDLE(%u) packet, got %u",
SSH2_FXP_HANDLE, type);
handle = buffer_get_string(&msg, len);
buffer_free(&msg);
return(handle);
}
static Attrib *
get_decode_stat(int fd, u_int expected_id, int quiet)
{
Buffer msg;
u_int type, id;
Attrib *a;
buffer_init(&msg);
get_msg(fd, &msg);
type = buffer_get_char(&msg);
id = buffer_get_int(&msg);
debug3("Received stat reply T:%u I:%u", type, id);
if (id != expected_id)
fatal("ID mismatch (%u != %u)", id, expected_id);
if (type == SSH2_FXP_STATUS) {
int status = buffer_get_int(&msg);
if (quiet)
debug("Couldn't stat remote file: %s", fx2txt(status));
else
error("Couldn't stat remote file: %s", fx2txt(status));
return(NULL);
} else if (type != SSH2_FXP_ATTRS) {
fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
SSH2_FXP_ATTRS, type);
}
a = decode_attrib(&msg);
buffer_free(&msg);
return(a);
}
struct sftp_conn *
do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests)
{
u_int type;
int version;
Buffer msg;
struct sftp_conn *ret;
buffer_init(&msg);
buffer_put_char(&msg, SSH2_FXP_INIT);
buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
send_msg(fd_out, &msg);
buffer_clear(&msg);
get_msg(fd_in, &msg);
/* Expecting a VERSION reply */
if ((type = buffer_get_char(&msg)) != SSH2_FXP_VERSION) {
error("Invalid packet back from SSH2_FXP_INIT (type %u)",
type);
buffer_free(&msg);
return(NULL);
}
version = buffer_get_int(&msg);
debug2("Remote version: %d", version);
/* Check for extensions */
while (buffer_len(&msg) > 0) {
char *name = buffer_get_string(&msg, NULL);
char *value = buffer_get_string(&msg, NULL);
debug2("Init extension: \"%s\"", name);
xfree(name);
xfree(value);
}
buffer_free(&msg);
ret = xmalloc(sizeof(*ret));
ret->fd_in = fd_in;
ret->fd_out = fd_out;
ret->transfer_buflen = transfer_buflen;
ret->num_requests = num_requests;
ret->version = version;
ret->msg_id = 1;
/* Some filexfer v.0 servers don't support large packets */
if (version == 0)
ret->transfer_buflen = MIN(ret->transfer_buflen, 20480);
return(ret);
}
u_int
sftp_proto_version(struct sftp_conn *conn)
{
return(conn->version);
}
int
do_close(struct sftp_conn *conn, char *handle, u_int handle_len)
{
u_int id, status;
Buffer msg;
buffer_init(&msg);
id = conn->msg_id++;
buffer_put_char(&msg, SSH2_FXP_CLOSE);
buffer_put_int(&msg, id);
buffer_put_string(&msg, handle, handle_len);
send_msg(conn->fd_out, &msg);
debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
status = get_status(conn->fd_in, id);
if (status != SSH2_FX_OK)
error("Couldn't close file: %s", fx2txt(status));
buffer_free(&msg);
return(status);
}
static int
do_lsreaddir(struct sftp_conn *conn, char *path, int printflag,
SFTP_DIRENT ***dir)
{
Buffer msg;
u_int type, id, handle_len, i, expected_id, ents = 0;
char *handle;
id = conn->msg_id++;
buffer_init(&msg);
buffer_put_char(&msg, SSH2_FXP_OPENDIR);
buffer_put_int(&msg, id);
buffer_put_cstring(&msg, path);
send_msg(conn->fd_out, &msg);
buffer_clear(&msg);
handle = get_handle(conn->fd_in, id, &handle_len);
if (handle == NULL)
return(-1);
if (dir) {
ents = 0;
*dir = xmalloc(sizeof(**dir));
(*dir)[0] = NULL;
}
for (;;) {
int count;
id = expected_id = conn->msg_id++;
debug3("Sending SSH2_FXP_READDIR I:%u", id);
buffer_clear(&msg);
buffer_put_char(&msg, SSH2_FXP_READDIR);
buffer_put_int(&msg, id);
buffer_put_string(&msg, handle, handle_len);
send_msg(conn->fd_out, &msg);
buffer_clear(&msg);
get_msg(conn->fd_in, &msg);
type = buffer_get_char(&msg);
id = buffer_get_int(&msg);
debug3("Received reply T:%u I:%u", type, id);
if (id != expected_id)
fatal("ID mismatch (%u != %u)", id, expected_id);
if (type == SSH2_FXP_STATUS) {
int status = buffer_get_int(&msg);
debug3("Received SSH2_FXP_STATUS %d", status);
if (status == SSH2_FX_EOF) {
break;
} else {
error("Couldn't read directory: %s",
fx2txt(status));
do_close(conn, handle, handle_len);
return(status);
}
} else if (type != SSH2_FXP_NAME)
fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
SSH2_FXP_NAME, type);
count = buffer_get_int(&msg);
if (count == 0)
break;
debug3("Received %d SSH2_FXP_NAME responses", count);
for (i = 0; i < count; i++) {
char *filename, *longname;
Attrib *a;
filename = buffer_get_string(&msg, NULL);
longname = buffer_get_string(&msg, NULL);
a = decode_attrib(&msg);
if (printflag)
printf("%s\n", longname);
if (dir) {
*dir = xrealloc(*dir, sizeof(**dir) *
(ents + 2));
(*dir)[ents] = xmalloc(sizeof(***dir));
(*dir)[ents]->filename = xstrdup(filename);
(*dir)[ents]->longname = xstrdup(longname);
memcpy(&(*dir)[ents]->a, a, sizeof(*a));
(*dir)[++ents] = NULL;
}
xfree(filename);
xfree(longname);
}
}
buffer_free(&msg);
do_close(conn, handle, handle_len);
xfree(handle);
return(0);
}
int
do_ls(struct sftp_conn *conn, char *path)
{
return(do_lsreaddir(conn, path, 1, NULL));
}
int
do_readdir(struct sftp_conn *conn, char *path, SFTP_DIRENT ***dir)
{
return(do_lsreaddir(conn, path, 0, dir));
}
void free_sftp_dirents(SFTP_DIRENT **s)
{
int i;
for (i = 0; s[i]; i++) {
xfree(s[i]->filename);
xfree(s[i]->longname);
xfree(s[i]);
}
xfree(s);
}
int
do_rm(struct sftp_conn *conn, char *path)
{
u_int status, id;
debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
id = conn->msg_id++;
send_string_request(conn->fd_out, id, SSH2_FXP_REMOVE, path,
strlen(path));
status = get_status(conn->fd_in, id);
if (status != SSH2_FX_OK)
error("Couldn't delete file: %s", fx2txt(status));
return(status);
}
int
do_mkdir(struct sftp_conn *conn, char *path, Attrib *a)
{
u_int status, id;
id = conn->msg_id++;
send_string_attrs_request(conn->fd_out, id, SSH2_FXP_MKDIR, path,
strlen(path), a);
status = get_status(conn->fd_in, id);
if (status != SSH2_FX_OK)
error("Couldn't create directory: %s", fx2txt(status));
return(status);
}
int
do_rmdir(struct sftp_conn *conn, char *path)
{
u_int status, id;
id = conn->msg_id++;
send_string_request(conn->fd_out, id, SSH2_FXP_RMDIR, path,
strlen(path));
status = get_status(conn->fd_in, id);
if (status != SSH2_FX_OK)
error("Couldn't remove directory: %s", fx2txt(status));
return(status);
}
Attrib *
do_stat(struct sftp_conn *conn, char *path, int quiet)
{
u_int id;
id = conn->msg_id++;
send_string_request(conn->fd_out, id,
conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
path, strlen(path));
return(get_decode_stat(conn->fd_in, id, quiet));
}
Attrib *
do_lstat(struct sftp_conn *conn, char *path, int quiet)
{
u_int id;
if (conn->version == 0) {
if (quiet)
debug("Server version does not support lstat operation");
else
log("Server version does not support lstat operation");
return(do_stat(conn, path, quiet));
}
id = conn->msg_id++;
send_string_request(conn->fd_out, id, SSH2_FXP_LSTAT, path,
strlen(path));
return(get_decode_stat(conn->fd_in, id, quiet));
}
Attrib *
do_fstat(struct sftp_conn *conn, char *handle, u_int handle_len, int quiet)
{
u_int id;
id = conn->msg_id++;
send_string_request(conn->fd_out, id, SSH2_FXP_FSTAT, handle,
handle_len);
return(get_decode_stat(conn->fd_in, id, quiet));
}
int
do_setstat(struct sftp_conn *conn, char *path, Attrib *a)
{
u_int status, id;
id = conn->msg_id++;
send_string_attrs_request(conn->fd_out, id, SSH2_FXP_SETSTAT, path,
strlen(path), a);
status = get_status(conn->fd_in, id);
if (status != SSH2_FX_OK)
error("Couldn't setstat on \"%s\": %s", path,
fx2txt(status));
return(status);
}
int
do_fsetstat(struct sftp_conn *conn, char *handle, u_int handle_len,
Attrib *a)
{
u_int status, id;
id = conn->msg_id++;
send_string_attrs_request(conn->fd_out, id, SSH2_FXP_FSETSTAT, handle,
handle_len, a);
status = get_status(conn->fd_in, id);
if (status != SSH2_FX_OK)
error("Couldn't fsetstat: %s", fx2txt(status));
return(status);
}
char *
do_realpath(struct sftp_conn *conn, char *path)
{
Buffer msg;
u_int type, expected_id, count, id;
char *filename, *longname;
Attrib *a;
expected_id = id = conn->msg_id++;
send_string_request(conn->fd_out, id, SSH2_FXP_REALPATH, path,
strlen(path));
buffer_init(&msg);
get_msg(conn->fd_in, &msg);
type = buffer_get_char(&msg);
id = buffer_get_int(&msg);
if (id != expected_id)
fatal("ID mismatch (%u != %u)", id, expected_id);
if (type == SSH2_FXP_STATUS) {
u_int status = buffer_get_int(&msg);
error("Couldn't canonicalise: %s", fx2txt(status));
return(NULL);
} else if (type != SSH2_FXP_NAME)
fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
SSH2_FXP_NAME, type);
count = buffer_get_int(&msg);
if (count != 1)
fatal("Got multiple names (%d) from SSH_FXP_REALPATH", count);
filename = buffer_get_string(&msg, NULL);
longname = buffer_get_string(&msg, NULL);
a = decode_attrib(&msg);
debug3("SSH_FXP_REALPATH %s -> %s", path, filename);
xfree(longname);
buffer_free(&msg);
return(filename);
}
int
do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
{
Buffer msg;
u_int status, id;
buffer_init(&msg);
/* Send rename request */
id = conn->msg_id++;
buffer_put_char(&msg, SSH2_FXP_RENAME);
buffer_put_int(&msg, id);
buffer_put_cstring(&msg, oldpath);
buffer_put_cstring(&msg, newpath);
send_msg(conn->fd_out, &msg);
debug3("Sent message SSH2_FXP_RENAME \"%s\" -> \"%s\"", oldpath,
newpath);
buffer_free(&msg);
status = get_status(conn->fd_in, id);
if (status != SSH2_FX_OK)
error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
newpath, fx2txt(status));
return(status);
}
int
do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
{
Buffer msg;
u_int status, id;
if (conn->version < 3) {
error("This server does not support the symlink operation");
return(SSH2_FX_OP_UNSUPPORTED);
}
buffer_init(&msg);
/* Send rename request */
id = conn->msg_id++;
buffer_put_char(&msg, SSH2_FXP_SYMLINK);
buffer_put_int(&msg, id);
buffer_put_cstring(&msg, oldpath);
buffer_put_cstring(&msg, newpath);
send_msg(conn->fd_out, &msg);
debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
newpath);
buffer_free(&msg);
status = get_status(conn->fd_in, id);
if (status != SSH2_FX_OK)
error("Couldn't rename file \"%s\" to \"%s\": %s", oldpath,
newpath, fx2txt(status));
return(status);
}
char *
do_readlink(struct sftp_conn *conn, char *path)
{
Buffer msg;
u_int type, expected_id, count, id;
char *filename, *longname;
Attrib *a;
expected_id = id = conn->msg_id++;
send_string_request(conn->fd_out, id, SSH2_FXP_READLINK, path,
strlen(path));
buffer_init(&msg);
get_msg(conn->fd_in, &msg);
type = buffer_get_char(&msg);
id = buffer_get_int(&msg);
if (id != expected_id)
fatal("ID mismatch (%u != %u)", id, expected_id);
if (type == SSH2_FXP_STATUS) {
u_int status = buffer_get_int(&msg);
error("Couldn't readlink: %s", fx2txt(status));
return(NULL);
} else if (type != SSH2_FXP_NAME)
fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
SSH2_FXP_NAME, type);
count = buffer_get_int(&msg);
if (count != 1)
fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
filename = buffer_get_string(&msg, NULL);
longname = buffer_get_string(&msg, NULL);
a = decode_attrib(&msg);
debug3("SSH_FXP_READLINK %s -> %s", path, filename);
xfree(longname);
buffer_free(&msg);
return(filename);
}
static void
send_read_request(int fd_out, u_int id, u_int64_t offset, u_int len,
char *handle, u_int handle_len)
{
Buffer msg;
buffer_init(&msg);
buffer_clear(&msg);
buffer_put_char(&msg, SSH2_FXP_READ);
buffer_put_int(&msg, id);
buffer_put_string(&msg, handle, handle_len);
buffer_put_int64(&msg, offset);
buffer_put_int(&msg, len);
send_msg(fd_out, &msg);
buffer_free(&msg);
}
int
do_download(struct sftp_conn *conn, char *remote_path, char *local_path,
int pflag)
{
Attrib junk, *a;
Buffer msg;
char *handle;
int local_fd, status, num_req, max_req, write_error;
int read_error, write_errno;
u_int64_t offset, size;
u_int handle_len, mode, type, id, buflen;
struct request {
u_int id;
u_int len;
u_int64_t offset;
TAILQ_ENTRY(request) tq;
};
TAILQ_HEAD(reqhead, request) requests;
struct request *req;
TAILQ_INIT(&requests);
a = do_stat(conn, remote_path, 0);
if (a == NULL)
return(-1);
/* XXX: should we preserve set[ug]id? */
if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
mode = S_IWRITE | (a->perm & 0777);
else
mode = 0666;
if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
(a->perm & S_IFDIR)) {
error("Cannot download a directory: %s", remote_path);
return(-1);
}
if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
size = a->size;
else
size = 0;
buflen = conn->transfer_buflen;
buffer_init(&msg);
/* Send open request */
id = conn->msg_id++;
buffer_put_char(&msg, SSH2_FXP_OPEN);
buffer_put_int(&msg, id);
buffer_put_cstring(&msg, remote_path);
buffer_put_int(&msg, SSH2_FXF_READ);
attrib_clear(&junk); /* Send empty attributes */
encode_attrib(&msg, &junk);
send_msg(conn->fd_out, &msg);
debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
handle = get_handle(conn->fd_in, id, &handle_len);
if (handle == NULL) {
buffer_free(&msg);
return(-1);
}
local_fd = open(local_path, O_WRONLY | O_CREAT | O_TRUNC, mode);
if (local_fd == -1) {
error("Couldn't open local file \"%s\" for writing: %s",
local_path, strerror(errno));
buffer_free(&msg);
xfree(handle);
return(-1);
}
/* Read from remote and write to local */
write_error = read_error = write_errno = num_req = offset = 0;
max_req = 1;
while (num_req > 0 || max_req > 0) {
char *data;
u_int len;
/* Send some more requests */
while (num_req < max_req) {
debug3("Request range %llu -> %llu (%d/%d)",
(unsigned long long)offset,
(unsigned long long)offset + buflen - 1,
num_req, max_req);
req = xmalloc(sizeof(*req));
req->id = conn->msg_id++;
req->len = buflen;
req->offset = offset;
offset += buflen;
num_req++;
TAILQ_INSERT_TAIL(&requests, req, tq);
send_read_request(conn->fd_out, req->id, req->offset,
req->len, handle, handle_len);
}
buffer_clear(&msg);
get_msg(conn->fd_in, &msg);
type = buffer_get_char(&msg);
id = buffer_get_int(&msg);
debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
/* Find the request in our queue */
for(req = TAILQ_FIRST(&requests);
req != NULL && req->id != id;
req = TAILQ_NEXT(req, tq))
;
if (req == NULL)
fatal("Unexpected reply %u", id);
switch (type) {
case SSH2_FXP_STATUS:
status = buffer_get_int(&msg);
if (status != SSH2_FX_EOF)
read_error = 1;
max_req = 0;
TAILQ_REMOVE(&requests, req, tq);
xfree(req);
num_req--;
break;
case SSH2_FXP_DATA:
data = buffer_get_string(&msg, &len);
debug3("Received data %llu -> %llu",
(unsigned long long)req->offset,
(unsigned long long)req->offset + len - 1);
if (len > req->len)
fatal("Received more data than asked for "
"%u > %u", len, req->len);
if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
atomic_write(local_fd, data, len) != len) &&
!write_error) {
write_errno = errno;
write_error = 1;
max_req = 0;
}
xfree(data);
if (len == req->len) {
TAILQ_REMOVE(&requests, req, tq);
xfree(req);
num_req--;
} else {
/* Resend the request for the missing data */
debug3("Short data block, re-requesting "
"%llu -> %llu (%2d)",
(unsigned long long)req->offset + len,
(unsigned long long)req->offset +
req->len - 1, num_req);
req->id = conn->msg_id++;
req->len -= len;
req->offset += len;
send_read_request(conn->fd_out, req->id,
req->offset, req->len, handle, handle_len);
/* Reduce the request size */
if (len < buflen)
buflen = MAX(MIN_READ_SIZE, len);
}
if (max_req > 0) { /* max_req = 0 iff EOF received */
if (size > 0 && offset > size) {
/* Only one request at a time
* after the expected EOF */
debug3("Finish at %llu (%2d)",
(unsigned long long)offset,
num_req);
max_req = 1;
}
else if (max_req < conn->num_requests + 1) {
++max_req;
}
}
break;
default:
fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
SSH2_FXP_DATA, type);
}
}
/* Sanity check */
if (TAILQ_FIRST(&requests) != NULL)
fatal("Transfer complete, but requests still in queue");
if (read_error) {
error("Couldn't read from remote file \"%s\" : %s",
remote_path, fx2txt(status));
do_close(conn, handle, handle_len);
} else if (write_error) {
error("Couldn't write to \"%s\": %s", local_path,
strerror(write_errno));
status = -1;
do_close(conn, handle, handle_len);
} else {
status = do_close(conn, handle, handle_len);
/* Override umask and utimes if asked */
if (pflag && fchmod(local_fd, mode) == -1)
error("Couldn't set mode on \"%s\": %s", local_path,
strerror(errno));
if (pflag && (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
struct timeval tv[2];
tv[0].tv_sec = a->atime;
tv[1].tv_sec = a->mtime;
tv[0].tv_usec = tv[1].tv_usec = 0;
if (utimes(local_path, tv) == -1)
error("Can't set times on \"%s\": %s",
local_path, strerror(errno));
}
}
close(local_fd);
buffer_free(&msg);
xfree(handle);
return(status);
}
int
do_upload(struct sftp_conn *conn, char *local_path, char *remote_path,
int pflag)
{
int local_fd, status;
u_int handle_len, id, type;
u_int64_t offset;
char *handle, *data;
Buffer msg;
struct stat sb;
Attrib a;
u_int32_t startid;
u_int32_t ackid;
struct outstanding_ack {
u_int id;
u_int len;
u_int64_t offset;
TAILQ_ENTRY(outstanding_ack) tq;
};
TAILQ_HEAD(ackhead, outstanding_ack) acks;
struct outstanding_ack *ack;
TAILQ_INIT(&acks);
if ((local_fd = open(local_path, O_RDONLY, 0)) == -1) {
error("Couldn't open local file \"%s\" for reading: %s",
local_path, strerror(errno));
return(-1);
}
if (fstat(local_fd, &sb) == -1) {
error("Couldn't fstat local file \"%s\": %s",
local_path, strerror(errno));
close(local_fd);
return(-1);
}
stat_to_attrib(&sb, &a);
a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
a.perm &= 0777;
if (!pflag)
a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
buffer_init(&msg);
/* Send open request */
id = conn->msg_id++;
buffer_put_char(&msg, SSH2_FXP_OPEN);
buffer_put_int(&msg, id);
buffer_put_cstring(&msg, remote_path);
buffer_put_int(&msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC);
encode_attrib(&msg, &a);
send_msg(conn->fd_out, &msg);
debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, remote_path);
buffer_clear(&msg);
handle = get_handle(conn->fd_in, id, &handle_len);
if (handle == NULL) {
close(local_fd);
buffer_free(&msg);
return(-1);
}
startid = ackid = id + 1;
data = xmalloc(conn->transfer_buflen);
/* Read from local and write to remote */
offset = 0;
for (;;) {
int len;
/*
* Can't use atomicio here because it returns 0 on EOF, thus losing
* the last block of the file
*/
do
len = read(local_fd, data, conn->transfer_buflen);
while ((len == -1) && (errno == EINTR || errno == EAGAIN));
if (len == -1)
fatal("Couldn't read from \"%s\": %s", local_path,
strerror(errno));
if (len != 0) {
ack = xmalloc(sizeof(*ack));
ack->id = ++id;
ack->offset = offset;
ack->len = len;
TAILQ_INSERT_TAIL(&acks, ack, tq);
buffer_clear(&msg);
buffer_put_char(&msg, SSH2_FXP_WRITE);
buffer_put_int(&msg, ack->id);
buffer_put_string(&msg, handle, handle_len);
buffer_put_int64(&msg, offset);
buffer_put_string(&msg, data, len);
send_msg(conn->fd_out, &msg);
debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
id, (unsigned long long)offset, len);
} else if (TAILQ_FIRST(&acks) == NULL)
break;
if (ack == NULL)
fatal("Unexpected ACK %u", id);
if (id == startid || len == 0 ||
id - ackid >= conn->num_requests) {
u_int r_id;
buffer_clear(&msg);
get_msg(conn->fd_in, &msg);
type = buffer_get_char(&msg);
r_id = buffer_get_int(&msg);
if (type != SSH2_FXP_STATUS)
fatal("Expected SSH2_FXP_STATUS(%d) packet, "
"got %d", SSH2_FXP_STATUS, type);
status = buffer_get_int(&msg);
debug3("SSH2_FXP_STATUS %d", status);
/* Find the request in our queue */
for(ack = TAILQ_FIRST(&acks);
ack != NULL && ack->id != r_id;
ack = TAILQ_NEXT(ack, tq))
;
if (ack == NULL)
fatal("Can't find request for ID %u", r_id);
TAILQ_REMOVE(&acks, ack, tq);
if (status != SSH2_FX_OK) {
error("Couldn't write to remote file \"%s\": %s",
remote_path, fx2txt(status));
do_close(conn, handle, handle_len);
close(local_fd);
goto done;
}
debug3("In write loop, ack for %u %u bytes at %llu",
ack->id, ack->len, (unsigned long long)ack->offset);
++ackid;
xfree(ack);
}
offset += len;
}
xfree(data);
if (close(local_fd) == -1) {
error("Couldn't close local file \"%s\": %s", local_path,
strerror(errno));
do_close(conn, handle, handle_len);
status = -1;
goto done;
}
/* Override umask and utimes if asked */
if (pflag)
do_fsetstat(conn, handle, handle_len, &a);
status = do_close(conn, handle, handle_len);
done:
xfree(handle);
buffer_free(&msg);
return(status);
}